Steam-engine valve.



No. s45,|9 4. Patgnted Mar. 13, I900.

A TANDLER; STEAM ENGINE VALVE.

(Application filed may 8. 1399.) (No Model.) I 3 Sheets-Sheet N0. 645,!94. Patented Mar. l3,- I900."

A. TANDLER. STEAM ENGINE VALVE.

, (Application filed May 8, 1899.)

(No Model.) 3 sheets-sheet 2.

m: nanms rum co, PNOYO-LITHCL. wmmai'om a. c.

Patented Mar. |3, {900.

3 Shets-Shet A. TANDLER. SIEAM ENGINE VALVE.

m allium" UNITED STATES PATENT FFlCE- ANTONE TANDLE R, OF CHICAGO, ILLINOIS.

STEAM-ENGINE VALVET';

SPECIFICATION forming part of Letters Patent No. 645,194, dated March 13, 1900;

Application filed May 8, 1899. Serial No. 715,961. (No model.)

T0 whom it may concern:

Be it known that I, ANTONE TANDLER, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Steam-Engine Valves, of which the following is a specification.

In large high-speed double-acting engines difficulty is encountered in quickly removing the exhaust-steam from the cylinder, the ordinary steam-valve mechanism not presenting an exhaust-opening of sufficient area to permit of the easy escape of the exhauststeam. By reason of this imperfect operation of the steam-valve the exhaust-steam must be considerably compressed in the cylinder by the returning piston in order that it may be forced through the inadequate exhaust ports, whereby the mechanical parts of the engine are strained and the economy of its operation and the efficiency of its performance are impaired. To overcome these objections and remedy the defects indicated are among the objects of this invention; and these objects are attained by the production of a piston-valve having auxiliary exhaust-ports, by means of which the area of the exhaust-port is largely'increased and said exhaust quickly opened.

While the valve herein described is particularly adapted to high-speed engines, it is economically applicable to powerful lowspeed engines where a large quick-acting exhaust is desirable.

In the accompanying drawings, Figure 1 is a longitudinal vertical central section through the steam-chest, showing the parts in position for the admission of steam to the front end of the engine-cylinder and showing the piston in said cylinder at the forward end of its stroke. Fig. 2 is likewise a longitudinal vertical, central section of the steam-chest, showing the piston nearing the opposite end of its stroke and the valve and all its parts nearing a position to admit steam to the rear end of the engine-cylinder and to open the exhaust for the expulsion of the spent steam in the forward end of the cylinder upon the return stroke of the piston. Fig. 3 is a trans verse vertical section through the steam chest and valve on dotted line as a; of Fig. 2, showing the auxiliary exhaust-ports.

is a side elevation of the supporting-spider for the piston-heads of the valve. Fig. 5 is an end elevation of said spider. Fig. 6 is a side elevation of one of the valve-heads. Fig.

7 is an inside face view thereof. Fig. 8 is a side elevation of one of the puppet-valves.

Like letters of reference indicate corresponding parts throughout the several views.

In the embodiment of this invention I provide an engine-cylinder A of ordinary construction with the usual piston B and pistonrod 0, surmounting the cylinderA by a steamchest D, having the steam-jacket D for the admission of live steam from the boiler and having also the heads D secured to the steamchest by tap-bolts in the usual manner. The interior" of the steam-cl1est D is bored and counterbored as is customary in steam-chests.

of this kind, and has communication with the cylinder by the ports A and A and With the outer air by thee'xhaust-port A E is the valve-spider, composed of the hub E, the radially-extending web-arms E the rims E and the annular end rings E and E The annular rings E and E are separated from the rims E by the lugs E forming at either end of the spider the auxiliary ports E aud E The ring E and the adjacent rim E and the ring E and its adjacent rim E are provided with the packing E fitting the spider to the bore of the steam-chest D, which packing is cut away opposite the auxiliary ports E and E The hub E is provided with a longitudinal central opening E extending therethrough. Y

The tapering puppet-valves F and Fare seated in the annular rings E and E respectively, of the valve-spider E. These puppet-valves are provided with stems F and F respectively, extending inward within the central opening E of the spider E, which said stems are of such a length that when one of said puppet-valves is closed upon its seat the other valve is forced open by the engagement of the stems of said valves. The closure of the puppet-valve F closes the auxil iary ports E and the closure of the puppetvalve F' closes the auxiliary ports E The puppet-valve F, and consequently the auxiliary ports E, are closed during the rearward stroke of the piston B, and the puppet-valve Fig. 4: F and the auxiliary ports E are then open for the passage of the exhaust. The puppetvalve F and the auxiliary ports E are closed during the admission of steam through the port A to the rear end of the cylinder A, and at such times the puppet-valve F and the auxiliary ports E are open to the exhaust. The helical springs F and F surround the stems F and F of the puppet-valves and cushion the closing of said valves, as well as assisting in the opening thereof. The puppet-valves F and F are provided with the central outwardly-extending pistons F and F respectively, the purpose of which will be later described herein.

The piston-heads G and G of the valve are rigidly secured by means of the bolts G to the annular rings E and E respectively, of the valve-spider E, which piston-heads are provided with the packing G to make them tight with the bore of the steam-chest D. Each piston-head is also provided with the circumferential groove G and the transverse peripheral grooves G which latter grooves extend, as well, across a portion of the peripheral faces of the annular rings E and E respectively,communicating with the circumferential grooves G. The openings G in the faces of the piston-heads G and G communicate through the openings G with the circumferential grooves G and term means of access for the live steam to the chambers H and H over the puppet-valves F and F. The piston-head G has a rigid connection with the valve-rod G and is provided with the central opening G for the reception of the piston F, forming a small cylinder in which said piston fits tightly. The opening G is provided with the inlet G for the admission of live steam to the closed end of said opening G". The similar opening G is provided in the piston-head G as a-cylinder for the reception of the piston F and this opening also has the aperture G for the admission of live steam to the closed end of the opening G The operation of this valve is as follows, having reference to Fig. 1, wherein theparts are represented as occupying such relative positions that live steam within the steamchest D would be free to pass through the port A into the cylinder A, in the clearancespace in front of the piston B. The pressure of this steam exerted upon the front of said piston pushes it backward in the cylinder A, also opening the port A by driving the valve in the same direction as that pursuedby the piston. Live steam also enters the openings G and G in the piston-head G, holding the puppet-valve F firmly against its seat in the annular ring E in which it is also assisted by the pressure of the live steam upon the piston F, formed integral with the puppetvalve F, which steam enters the opening G through the passage G This closing of the puppet-valve F and the auxiliary, ports E opens the puppet-valve F and the auxiliary ports E and the rearward movement of the steam-valve opens the port A into the port A permitting the air in the rear end of the cylinder A to be from thence discharged. When the piston nears the rear end of the cylinder A, the parts assume the positions as passage of the exhaust from the forward end of the cylinder as soon as the movement of the steam-valve places the port A into communication with the exhaust-port A and opens the port A for the admission of live steam into the rear end of the cylinder A.

I claim as my invention- 1. In a steam-engine valve, in combination, a steam-chest having steam-ports and an exhaust-port communicating with the interior of the steam-chest; a reciprocatory valvespider therein, having an auxiliary port in each of its ends; and a valve for each of said auxiliary ports, one of which valves has a stem fixed thereto adapted to actuate the other valve,which said stem is of such length that one of said valves is opened when the other valve is closed.

2. In a steam-engine valve, in combination, a steam-chest having steam-ports and an exhaust-port communicating with the interior of the steam-chest; a valve-spider having a longitudinal opening therein, and being pro vided with an auxiliary steam-port at each of its ends; and a valve for each of said auxiliary ports, each of which valves has a stem fixed thereto, adapted to lie within the longitudinal opening in said valve-spider, which stems are of such length as to engage each other and cause one of said valves to be opened when the other is closed.

3. In a steam-engine valve, in combination, a steam-chest having steam-ports and an exhaust-port communicating with the interior of the steam chest, a reciprocatory valvespider having'an auxiliary port at each end of said spider, a valve for each of said auxiliary ports, one of which valves is adapted to have an engagement with the other valve, and a piston-head for each end of said spider, each of which piston heads has an opening extending from its periphery to a point in its face.

4. In a steam-engine valve, in combination, a steam-chest having steam-ports and an exhaust-port communicating with the interior of the steam-chest, a reciprocatory valvespider having an auxiliary port at each of its" ends and a longitudinal opening, a valve for each of said auxiliary ports, each of which valves has a stem adapted to extend Within the longitudinal opening in said spider and an oppositely-extending piston, and a pistonhead secured to each end of said spider,each of which piston-heads has an opening extending from its periphery to a point in its face, and a cylinder-opening for the reception of the piston on one of said valves.

5. In a steam-engine valve, in combination, a steam-chest having steam-ports and an exhaust-port communicating with the interior of the steam-chest, a reciprocatory valvespider having an auxiliary port at each end of said spider, also havinga longitudinal central opening, a valve for each of said auxiliary ports, each of which valves has a stem 

